Record U.S. ratings for World Cup

Reflecting the growing popularity of soccer in the United States, the 2014 World Cup keeps setting new ratings records.

The USA-Portugal match on ESPN averaged 18.2 million viewers on Sunday, topping the 11.1 million that tuned in for USA-Ghana on June 16.

Another 6.5 million viewers watched a Spanish-language broadcast of the USA-Portugal match on Univision, according to Nielsen ratings that were released Monday. Combined, the ESPN and Univision telecasts averaged almost 25 million viewers. (Another 1.4 million watched on the cable channel ESPN3.)

All of these audience figures are incomplete, though, because Nielsen does not measure any out-of-home viewing at bars, restaurants or other locations where people have congregated to watch World Cup matches, or any viewing on phones or computers.

ESPN said the live stream of the match via its WatchESPN app added another 490,000 viewers to the total audience.

All of these figures are averages for the duration of the 95-minute match. Unsurprisingly, total viewership was lower in the beginning and higher toward the end. ESPN said its viewership peaked between 7:30 and 8 p.m., in the final minutes of the match, when about 23 million viewers tuned in to its main channel.

ESPN said in a statement that USA-Portugal ranked as "the most-viewed soccer match in the United States ever, across all networks," eclipsing the "previous high of 17,975,000 viewers for the 1999 Women's World Cup final (USA vs. China) on ABC."